铝球弹丸高速正撞击薄铝板穿孔研究

 低地球轨道上的航天器易受到微流星体及空间碎片的超高速撞击，导致其严重的损伤甚至灾难性的失效。撞击损伤特性研究是航天器防护设计的一个重要问题。通过铝球弹丸超高速正撞击薄铝板的实验研究和数值模拟，证明了AUTODYN-2D软件数值模拟预测薄铝板超高速撞击穿孔直径的有效性。通过对弹丸直径、弹丸撞击速度和薄铝板厚度影响薄铝板超高速撞击穿孔直径的数值模拟，以及利用实验结果和数值模拟结果拟合的曲线，得到了铝球弹丸超高速撞击薄铝板的穿孔规律以及影响薄铝板超高速撞击穿孔直径的主要因素。

A Study of Penetration Hole Diameter in Thin Al-Plate by Hypervelocity Impact of Al-Spheres

All spacecraft in low orbit are subjected to hypervelocity impacts by meteoroids and space debris,which can lead to significant damage and catastrophic failure.Investigation into the impact damage characteristics has become an important problem for spacecraft protection designing.In this paper,by experiment and numerical simulation of hypervelocity impact on thin Al-plate by Al-spheres,and it is found that AUTODYN-2D SPH is an effective method of predicting penetration hole diameter in thin Al-plates from hypervelocity impact.By numerical simulation of projectile diameter,projectile velocity and thin Al-plate thickness effect on penetration hole diameter in thin Al-plates from hypervelocity impact,and fitting curves with experiment and simulation results,the law of penetration hole diameter and leading factors affecting penetration hole diameter in thin Al-plates from hypervelocity impact was proposed.